12" x 4" Floor Register HVAC Air Supply Grille - Heavy Duty Rigid Built - Plastic Never Rust Vent Duct Cover [Outer Dimensions: 14w X 6"h] Fixed Blades with Damper + Product Details Size –

+ Product Details Size – 12"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are 13

Powder-Coat Finish - Smooth

+ Product Details Size – 30"w X 8"h is the size for the duct opening measurement only

12" x 4" Floor Register HVAC Air Supply Grille - Heavy Duty Rigid Built - Plastic Never Rust Vent Duct Cover [Outer Dimensions: 14w X 6"h] Fixed Blades with Damper + Product Details Size –12"w X 4"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 14" Width X 6" Height SEE IN DESCRIPTION HOW TO MEASURE A GRILLE Solid Construction Designed For Floor Use High Quality ABS Plastic Will Last Forever & NEVER RUST Foot Operated Opposed Blade Damper For Full Air Flow Control And Shutoff Multi Angled Fan Pattern Fins For Multi Directional AIr Distribution Throughout The Entire Room 12" x 4" Floor Register